کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4499145 1319016 2007 16 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Stochastic von Bertalanffy models, with applications to fish recruitment
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم کشاورزی و بیولوژیک (عمومی)
پیش نمایش صفحه اول مقاله
Stochastic von Bertalanffy models, with applications to fish recruitment
چکیده انگلیسی

We consider three individual-based models describing growth in stochastic environments. Stochastic differential equations (SDEs) with identical von Bertalanffy deterministic parts are formulated, with a stochastic term which decreases, remains constant, or increases with organism size, respectively. Probability density functions for hitting times are evaluated in the context of fish growth and mortality. Solving the hitting time problem analytically or numerically shows that stochasticity can have a large positive impact on fish recruitment probability. It is also demonstrated that the observed mean growth rate of surviving individuals always exceeds the mean population growth rate, which itself exceeds the growth rate of the equivalent deterministic model. The consequences of these results in more general biological situations are discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Theoretical Biology - Volume 244, Issue 4, 21 February 2007, Pages 640–655
نویسندگان
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